Jennifer Aniston's ''guilty pleasure'' is watching 'Keeping Up With The Kardashians'.

The 'Cake' star has confessed she is ''very interested'' in the E! reality series documenting the lives of Kris, Kendall and Kylie Jenner, as well as Kim Kardashian West and her sisters Kourtney and Khloe.

She said: ''I sadly am very much interested in the Kardashian-Jenner thing. That's a guilty pleasure for sure.''

Jennifer also offered her thoughts on Caitlyn Jenner's Vanity Fair cover after the former Olympian - who was previously known as Bruce Jenner - appeared on the front of the magazine last week after undergoing a gender transition.

She said: ''I thought it was beautiful.''

Although the 46-year-old actress loves keeping up to date with the Kardashians' lives she doesn't understand how the avid social media users update their pages so regularly and admitted taking over her beauty company Living Proof's Instagram account last month left her feeling ''self conscious''.

Recalling her Instagram take over, she explained to PEOPLE: ''I was so stressed out. I was like these Kardashians. This is a career! You start to get so self-conscious.''